### Encrypt File using Command-Line Script

Source: https://github.com/marcobellaccini/pyaescrypt/blob/master/README.rst

Encrypts a file using the pyAesCrypt command-line script. The output file is automatically named with a .aes extension.

```bash
pyAesCrypt -e test.txt
```

--------------------------------

### Encrypt File to Specific Output using Command-Line Script

Source: https://github.com/marcobellaccini/pyaescrypt/blob/master/README.rst

Encrypts a file using the pyAesCrypt command-line script and specifies a custom output file name.

```bash
pyAesCrypt -e test.txt -o test2.txt.aes
```

--------------------------------

### Encrypt and Decrypt File

Source: https://github.com/marcobellaccini/pyaescrypt/blob/master/README.rst

Basic file encryption and decryption using default buffer size. This is the recommended method for file operations.

```python
import pyAesCrypt
password = "please-use-a-long-and-random-password"
# encrypt
pyAesCrypt.encryptFile("data.txt", "data.txt.aes", password)
# decrypt
pyAesCrypt.decryptFile("data.txt.aes", "dataout.txt", password)
```

--------------------------------

### Encrypt and Decrypt File with Custom Buffer Size

Source: https://github.com/marcobellaccini/pyaescrypt/blob/master/README.rst

File encryption and decryption with a specified buffer size. Useful for optimizing performance with large files.

```python
import pyAesCrypt
# custom encryption/decryption buffer size (default is 64KB)
bufferSize = 128 * 1024
password = "please-use-a-long-and-random-password"
# encrypt
pyAesCrypt.encryptFile("data.txt", "data.txt.aes", password, bufferSize)
# decrypt
pyAesCrypt.decryptFile("data.txt.aes", "dataout.txt", password, bufferSize)
```

--------------------------------

### Decrypt File to Specific Output using Command-Line Script

Source: https://github.com/marcobellaccini/pyaescrypt/blob/master/README.rst

Decrypts a file using the pyAesCrypt command-line script and specifies a custom output file name.

```bash
pyAesCrypt -d test.txt.aes -o test2.txt
```

--------------------------------

### Decrypt File using Command-Line Script

Source: https://github.com/marcobellaccini/pyaescrypt/blob/master/README.rst

Decrypts a file using the pyAesCrypt command-line script. The output file is automatically named by removing the .aes extension.

```bash
pyAesCrypt -d test.txt.aes
```

--------------------------------

### Encrypt and Decrypt Binary Streams

Source: https://github.com/marcobellaccini/pyaescrypt/blob/master/README.rst

Encryption and decryption of binary data using streams. Requires specifying a buffer size.

```python
import pyAesCrypt
from os import stat, remove
# encryption/decryption buffer size - 64K
# with stream-oriented functions, setting buffer size is mandatory
bufferSize = 64 * 1024
password = "please-use-a-long-and-random-password"

# encrypt
with open("data.txt", "rb") as fIn:
    with open("data.txt.aes", "wb") as fOut:
        pyAesCrypt.encryptStream(fIn, fOut, password, bufferSize)

# decrypt
with open("data.txt.aes", "rb") as fIn:
    try:
        with open("dataout.txt", "wb") as fOut:
            # decrypt file stream
            pyAesCrypt.decryptStream(fIn, fOut, password, bufferSize)
    except ValueError:
        # remove output file on error
        remove("dataout.txt")
```

--------------------------------

### In-Memory Encryption and Decryption

Source: https://github.com/marcobellaccini/pyaescrypt/blob/master/README.rst

Encrypts and decrypts binary data directly in memory using BytesIO streams. Requires specifying a buffer size.

```python
import pyAesCrypt
import io

bufferSize = 64 * 1024
password = "please-use-a-long-and-random-password"

# binary data to be encrypted
pbdata = b"This is binary plaintext \x00\x01"

# input plaintext binary stream
fIn = io.BytesIO(pbdata)

# initialize ciphertext binary stream
fCiph = io.BytesIO()

# initialize decrypted binary stream
fDec = io.BytesIO()

# encrypt stream
pyAesCrypt.encryptStream(fIn, fCiph, password, bufferSize)

# print encrypted data
print("This is the ciphertext:\n" + str(fCiph.getvalue()))

# go back to the start of the ciphertext stream
fCiph.seek(0)

# decrypt stream
pyAesCrypt.decryptStream(fCiph, fDec, password, bufferSize)

# print decrypted data
print("Decrypted data:\n" + str(fDec.getvalue()))
```

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